Webpack and TypeScript error: The configuration object is invalid due to 'configuration.resolve.extensions[0]'

I recently completed a tutorial on webpack without typescript, and then dove into another one on configuring webpack with typescript from this link. However, when I tried to build the project using npm run build as instructed in the second tutorial, I encountered the following error:

Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema. - configuration.resolve.extensions[0] should not be empty.

Despite my efforts, I have not been able to find a solution to this issue anywhere online.

In case it helps, here is a snippet of my webpack.config.js file:

module.exports = {
  entry: './main.ts',
  output: {
    filename: './bundle.js'
  },
  resolve: {
    extensions: ['', '.ts']
  },
  module: {
    loaders: [
      { test: /.ts$/, loader: 'awesome-typescript-loader' }
    ]
  }
};

Any guidance or suggestion would be greatly appreciated!

Answer №1

The most recent updates to webpack have made it so you can't include an empty string in the module.resolve.extensions array like you've been doing. You should either remove the empty string or replace it with a specific extension that you want to support.

module.exports = {
  entry: './index.js',
  output: {
    filename: './bundle.js'
  },
  resolve: {
    extensions: ['.js'] // remove the empty string and add '.jsx' if needed for JSX files
  },
  module: {
    rules: [  // 'loaders' has been replaced by 'rules', though 'loaders' still works for now
      { test: /.js$/, use: 'babel-loader' }
    ]
  }
};

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